aircraft was a guide for maintenance personnel. Author Leroy A Dufresne has several years experience working on the SR-71 in Maintenance and teaching. Hopefully this book will answer a variety of questions for those who have heard of the SR-71 or have seen it in person. This book was intended to help as a training aid to the maintainer, and now it is scaled down for the common person to have a bit more insight into the insides of this marvelous aircraft.